Her YouTube channel was littered with material criticising how the site was run

"Seemed serious and not like a drill.

"We headed towards the exit and then saw more people and someone said that there was a person with a gun. S***.

"At that point every new person I saw was a potential shooter.

"Someone else said that the person shot out the back doors and then shot themselves."

Was just briefed on the shooting at YouTube’s HQ in San Bruno, California. Our thoughts and prayers are with everybody involved. Thank you to our phenomenal Law Enforcement Officers and First Responders that are currently on the scene.